lsyncd/default.lua

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--============================================================================
-- default.lua Live (Mirror) Syncing Demon
--
-- The default table for the user to access.
-- This default layer 1 functions provide the higher layer functionality.
--
-- License: GPLv2 (see COPYING) or any later version
-- Authors: Axel Kittenberger <axkibe@gmail.com>
--============================================================================
2012-10-03 16:34:09 +00:00
if default then
error('default already loaded')
end
default = {
-----
-- Default action calls user scripts on**** functions.
--
action = function(inlet)
-- in case of moves getEvent returns the origin and dest of the move
local event, event2 = inlet.getEvent()
local config = inlet.getConfig()
local func = config['on'.. event.etype]
if func then
func(event, event2)
end
-- if function didnt change the wait status its not interested
-- in this event -> drop it.
if event.status == 'wait' then
inlet.discardEvent(event)
end
end,
-----
-- Default collector.
--
-- Called when collecting a finished child process
--
collect = function(agent, exitcode)
local config = agent.config
local rc
if config.exitcodes then
rc = config.exitcodes[exitcode]
elseif exitcode == 0 then
rc = 'ok'
else
rc = 'die'
end
-- TODO synchronize with similar code before
if not agent.isList and agent.etype == 'Init' then
if rc == 'ok' then
log('Normal', 'Startup of "',agent.source,'" finished.')
return 'ok'
elseif rc == 'again' then
if settings.insist then
log(
'Normal',
'Retrying startup of "',
agent.source,
'": ',
exitcode
)
return 'again'
else
log(
'Error',
'Temporary or permanent failure on startup of "',
agent.source,
'". Terminating since "insist" is not set.'
)
terminate(-1) -- ERRNO
end
elseif rc == 'die' then
log(
'Error',
'Failure on startup of "',
agent.source,
'".'
)
terminate(-1) -- ERRNO
else
log(
'Error',
'Unknown exitcode "',
exitcode,
'" on startup of "',
agent.source,
'".'
)
return 'die'
end
end
if agent.isList then
if rc == 'ok' then
log('Normal', 'Finished a list = ',exitcode)
elseif rc == 'again' then
log('Normal', 'Retrying a list on exitcode = ',exitcode)
elseif rc == 'die' then
log('Error', 'Failure with a list on exitcode = ',exitcode)
else
log('Error', 'Unknown exitcode "',exitcode,'" with a list')
rc = 'die'
end
else
if rc == 'ok' then
log('Normal', 'Retrying ',agent.etype,' on ',agent.sourcePath,' = ',exitcode)
elseif rc == 'again' then
log('Normal', 'Finished ',agent.etype,' on ',agent.sourcePath,' = ',exitcode)
elseif rc == 'die' then
log('Error', 'Failure with ',agent.etype,' on ',agent.sourcePath,' = ',exitcode)
else
log('Normal', 'Unknown exitcode "',exitcode,'" with ', agent.etype,
' on ',agent.sourcePath,' = ',exitcode)
rc = 'die'
end
end
return rc
end,
-----
-- called on (re)initialization of Lsyncd.
--
init = function(event)
local config = event.config
local inlet = event.inlet
-- user functions
-- calls a startup if given by user script.
if type(config.onStartup) == 'function' then
local startup = config.onStartup(event)
-- TODO honor some return codes of startup like "warmstart".
end
if event.status == 'wait' then
-- user script did not spawn anything
-- thus the blanket event is deleted again.
inlet.discardEvent(event)
end
end,
-----
-- The maximum number of processes Lsyncd will spawn simultanously for
-- one sync.
--
maxProcesses = 1,
-----
-- Try not to have more than these delays.
-- not too large, since total calculation for stacking
-- events is n*log(n) or so..
--
maxDelays = 1000,
-----
-- a default configuration using /bin/cp|rm|mv.
--
direct = default_direct,
------
-- Exitcodes of rsync and what to do.
--
rsyncExitCodes = {
[ 0] = 'ok',
[ 1] = 'die',
[ 2] = 'die',
[ 3] = 'again',
[ 4] = 'die',
[ 5] = 'again',
[ 6] = 'again',
[ 10] = 'again',
[ 11] = 'again',
[ 12] = 'again',
[ 14] = 'again',
[ 20] = 'again',
[ 21] = 'again',
[ 22] = 'again',
[ 23] = 'ok', -- partial transfers are ok, since Lsyncd has registered the event that
[ 24] = 'ok', -- caused the transfer to be partial and will recall rsync.
[ 25] = 'die',
[ 30] = 'again',
[ 35] = 'again',
[255] = 'again',
},
-----
-- Exitcodes of ssh and what to do.
--
sshExitCodes = {
[0] = 'ok',
[255] = 'again',
},
-----
-- Minimum seconds between two writes of a status file.
--
statusInterval = 10,
}